What are the differences between all -device configurations available for configure Qt5

Question

I follow this tutorial : https://wiki.qt.io/RaspberryPi2EGLFS#Step_by_step in order to compile Qt5.7 for Raspberry pi3.

I have succeeded to compile and start examples but after further investigations I found others device configuration in this directory :

ls -l qt5/qtbase/mkspecs/devices/

It contains :

...
linux-rasp-pi2-g++
linux-rasp-pi-g++
linux-rpi3-g++
linux-rpi3-vc4-g++
...

I'm not sure what is the best device option I have to set for the ./configure for Raspberry Pi3, someone can explain the differences between all these configurations?

Answer 1

If you are working with Raspberry Pi 3, you should use linux-rpi3-g++ or linux-rpi3-vc4-g++.

linux-rpi3-vc4-g++ should be used if you want to enable hardware acceleration. VC stands for Video Core. You have more information about Video Core IV in the wikipedia. I think it's worth it to try this configuration.

linux-rasp-pi-g++ is the configuration for the first model and linux-rasp-pi2-g++ for the Raspberry Pi 2.